[Dbix-class] transaction depth not reset in 0.08003

Richard Jolly richardjolly at mac.com
Wed Jul 18 21:42:08 GMT 2007

On 18 Jul 2007, at 20:26, Brandon Black wrote:

> Well, I've tracked this down a little bit further now.  I had poorly
> assumed $dbh->{AutoCommit} would statically remain at whatever value
> it was set to (or defaulted to) at DBI->connect time.  As it turns
> out, $dbh->begin_work turns off the $dbh->{AutoCommit} value, which is
> what's causing the confusion.

We noticed this recently as well. Probably should have provided more 
hints in my original mail :(

from DBI.pm:

     sub begin_work {
	my $dbh = shift;
	return $dbh->set_err(1, "Already in a transaction")
		unless $dbh->FETCH('AutoCommit');
	$dbh->STORE('AutoCommit', 0); # will croak if driver doesn't support it
	$dbh->STORE('BegunWork',  1); # trigger post commit/rollback action
	return 1;

I'm wondering why DBI turns off autocommit rather than issuing a BEGIN 
WORK statement - but I guess that's for the DBI list. It appears to be 
so as to provide consistent behaviour/interface at the DBI level. We 
were thrown off for a while because the 
DBIx::Class::Storage::Statistics logging shows a 'BEGIN WORK'. Both DBI 
and D::C::S::S document the behaivour, but it is just counter-intuitive 
enough that it's easy to overlook.

Thanks for the speedy response,


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